Cutting just upstream of the bell with a diamond blade is beginning to sound like a winner. I'll source one out tomorrow, and hopefully get this fixed very soon, since I now have a very big, deep hole in my backyard. haha

Yeh, I will dig it out more, I didn't just yet, because I didn't want to unbed the pipe just yet, since being cracked through, it might completely give way, then I would be out two bathrooms and one kitchen till this is finished.

House is to the left, flow is going right. So the bell is on the upstream side of the tile.

Then you have a bigger problem because S__t doesn't flow uphill!

Must just be a trick of how you're seeing the picture, because it's definitely down-sloped. In the pic, it is running diagonally away from me, from the lower left, to the upper right. The high PVC you see is the washout, coming vertically to the surface.